001/**
002 *   GRANITE DATA SERVICES
003 *   Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 *   This file is part of the Granite Data Services Platform.
006 *
007 *   Granite Data Services is free software; you can redistribute it and/or
008 *   modify it under the terms of the GNU Lesser General Public
009 *   License as published by the Free Software Foundation; either
010 *   version 2.1 of the License, or (at your option) any later version.
011 *
012 *   Granite Data Services is distributed in the hope that it will be useful,
013 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
014 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
015 *   General Public License for more details.
016 *
017 *   You should have received a copy of the GNU Lesser General Public
018 *   License along with this library; if not, write to the Free Software
019 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
020 *   USA, or see <http://www.gnu.org/licenses/>.
021 */
022package org.granite.gravity.generic;
023
024import org.granite.gravity.AbstractChannel;
025import org.granite.gravity.AsyncHttpContext;
026import org.granite.gravity.Gravity;
027import org.granite.gravity.MessageReceivingException;
028import org.granite.logging.Logger;
029
030import flex.messaging.messages.AsyncMessage;
031
032/**
033 * @author William DRAI
034 */
035public class GenericChannel extends AbstractChannel {
036
037    private static final Logger log = Logger.getLogger(GenericChannel.class);
038
039    private WaitingContinuation continuation = null;
040
041    public GenericChannel(Gravity gravity, String id, GenericChannelFactory factory, String clientType) {
042        super(gravity, id, factory, clientType);
043    }
044
045    public void setContinuation(WaitingContinuation continuation) {
046        try {
047            if (this.continuation != null && this.continuation.isPending()) {
048                log.debug("Set pending continuation for client: %s", getId());
049                this.continuation.resume();
050            }
051        }
052        finally {
053            this.continuation = continuation;
054        }
055    }
056    
057    public void close() {
058        try {
059            if (this.continuation != null)
060                this.continuation.reset();
061        }
062        finally {
063            this.continuation = null;
064        }
065    }
066    
067
068    public void resume() {
069        try {
070            if (this.continuation != null) {
071                log.debug("Resume pending continuation for client: %s", getId());
072                this.continuation.resume();
073            }
074        }
075        finally {
076            this.continuation = null;
077        }
078    }
079    
080    @Override
081        public void receive(AsyncMessage message) throws MessageReceivingException {
082                if (message == null)
083                        throw new NullPointerException("message cannot be null");
084                
085                receivedQueueLock.lock();
086                try {
087                        receivedQueue.add(message);
088                }
089                catch (Exception e) {
090                        throw new MessageReceivingException(message, "Could not queue message", e);
091                }
092                finally {
093                        receivedQueueLock.unlock();
094                }
095                
096                synchronized (this) {
097                        resume();
098                }
099        }
100
101        @Override
102        protected boolean hasAsyncHttpContext() {
103                return false;
104        }
105
106        @Override
107        protected void releaseAsyncHttpContext(AsyncHttpContext context) {
108        }
109
110        @Override
111        protected AsyncHttpContext acquireAsyncHttpContext() {
112        return null;
113    }
114
115    public boolean isLocal() {
116        return true;
117    }
118
119        @Override
120        public void destroy() {
121                try {
122                        super.destroy();
123                }
124                finally {
125                        synchronized (this) {
126                                close();
127                        }
128                }
129        }
130}